Gib



GIB

R E T L C H l A.

Filed Nov. 18, 1939 j? umllulwwm 41a Imm. H

Hum.. IHIHHIIH" $.13)

mlllmf.. Immun' l l INVE- ATTORNEY Patented Dec. 31, 1940 UNITED STATESPATENT OFT-TCE Claims.

The invention relates to gibs, particularly such as are used inconjunction With elevators as the guiding means to maintain the properposition' of the cage with relation to a rail. The object 5 of thepresent invention is to overcome` certain defects in existing gibs forthe stated purpose and to provide an improved instrumentality which willperform its work more satisfactorily and for longer periods of time.

At the present time it is customary to construct gibs for elevators inthe form of a trough made of wood, Bakelite, hard rubber, malakite, orbre. Such gibs are supported and held by a shoe .on the elevator and,when new, closely t l5 the rail along which the elevator moves. As soonas wear sets in it is apparent that the elevator will have more playroom, not only in a forward and back direction, but also from side toside, which results in bumps and in uneven progress and in further wear.When the wear becomes sufliciently large, the gib must be replaced.

According to my invention the gib is so constructed that it will t therail accurately notwithstanding wear and which need not be replaced, butrequires only replacement of the wearing surfaces, which to that end areremovably associated with a carrier.

The invention is illustrated in the accompanying drawing in which Fig. 1is a front face View of the carrier portion of the gib; Fig. 2 is acentral longitudinal section of Fig. 1; Fig. 3 is a face view of thethree wearing units; Fig. 4 is a section of Fig. 3 on line 4 4; Fig. 5is a front face view of the completely assembled gib constituted of theparts shown in Figs. 1-4; Fig. 6 is an enlarged cross-section on line6-6 of Fig. 5; and Fig. 7 is an enlarged cross-section on line 'I-'I ofFig. 5 with the parts in the positions occupied by them when the gib isassociated with 40 its guide rails.

In the drawing,Fi'gs. 6 and 7 show the carrier constructed of threeparts, I, 2, and 3, held together by screws 4. Any suitable material canbe used for this carrier such as malakite, wood,

iibre, etc. Two sets of such screws 4 are indicated in Fig. 1, but athird set as indicated in Figs. 2 and 7 may be used near the centralportion of the length of the carrier trough.

As indicated in Fig. 7, leaf springs 5, 6, and l,

also shown in Fig. 1, are centrally attached to each of the parts I, 2,and 3 by rivets 8. The ends of the springs 5, 6, and 'I are free and arebiased toward the center of the gib. Plates of cast metal babbitt 9, I0,and II are then inserted in the carrier trough I, 2, 3, and due to thepressure of the springs will occupy a position thereon such as shown inFig. 6. Each of the metal elements 9,r I0, and II have stepped contoursindicated atIZ, I3, and' I4 adapted to establish the relativeposition ofthe parts shown in 5 Fig. 6 and the relative position of the parts whenassociated with the elevator guide rail I5 shown in Fig. 7. Each of thecastings 9, III, and II'are provided with a central counter sink 'I6adapted to accommodate the heads of the rivets 8 which ILO extend intothev inner portion of the trough formed by the parts I, 2, and 3. Theposition of the spring 6 with respect to the carrier is xed by virtue ofrivet 8, and hence the spring cannot get out of position. Although thecastings 1.5 9, IU, and II are not secured to the carrier, they areprevented from being longitudinally displaced because the heads of therivets are seated in the countersinks I6. Thus each rivet 8 holds bothits spring and casting in correct 20 position with respect to thecarrier, and the casting can be renewed without longitudinallydisplacing the spring.

The ends of the castings I0 and II and of the trough sections 2 and 3are cut away at I'I as 25 indicated in Figs. 1, 2, 3, and 5 to providemeans by which the gib is held in position on the shoe I8 of theelevator. The means for forming this connection are well known andtherefore not described. At the ends of the metal parts 9, I 0, 30 andII some of the material is removed, as indicated at I9, to provide inthe assembled condition of the device, an entrance point for lubricants.

As more clearly indicated in Figs. 1 and 2, the 35 parts I, 2, and 3 ofthe carrier trough are recessed orrabbeted at 20 to accommodate thesprings 5, 6, and l, respectively, when the parts are in the positionshown in Fig. 7.

It will be readily observed from Fig. 7 that 40 when any wear occurs inthe metal portions 9, I0, or II, the springs 5, S, 'I will preserve aconstant position of the plates 9, II), and Il with relation to the railI5, until the Igap between the edges of the three plates is completelyclosed, 45 at which time the babbitt plates should be removed and newplates substituted therefor. 'Ihe loss of metal due to wear isrelatively insignicant and the material of the worn-out plates can beused for casting new plates. The replace- '50 ment of Worn plates by newplates isa matter of extreme simplicity since they merely have to belaid in their intended positions without requiring any mechanical ortool work. 'I'hroughout the use of the new gib the elevator Will be 55snugly associated with the guiding rail at all times and will beprotected against undue swaying or bumping due to increase (resultingfrom wear) in the space between the rail and the guiding surfaces withwhich the rail comes into contact. Typical dimensions for a gib of thecharacter described are for a 1/2 inch rail, a width and height of 11/2inches with respect to the trough shown in Figs. 6 and '7 and a lengthof 8% inches. AThe individual sections I, 2, and 3 of the trough have athickness of 1A, inch. The metal bearing plates 9, Ill, and I I havelthe same length and thickness as the sections of the trough, the uplates Ill and II, however, having a width of ll/gpA inches, while theinner plate 9 has a width of le@ of an inch. The springs 5, 6, 1 arepreferably made cf steel having dimensions sucht` as x 61/4 x 15" in thecase of'Y the elements I0, II, and about 1/2 X 61/2 X gli" for the endVplate 9. There are no projecting parts in the gib and its actionV inuse. is that of a positive bearing gripV which, notwithstanding wear,still keeps its `bearing surface and constantly bears on the rail and isquiet in its action.

Although the new gib hasbeen described with particular reference toitsusein connection with anelevator guide rail, it is capable of beingused and Vof functioning in connection with other moving bodies whichrequire a gibto control a relative constancy of position as between thegib and the part with which* itis in sliding engagement.

I claim:

l. A guide shoe comprising a gib carrier, a leaf spring, a rivetsecuring the central portion of 4saidspring to said carrier, said rivethaving a head projecting into the interior of said carrier, and a gibhaving a countersink mounted within said carrier with said countersinkengaging said rivet head.

2. A guide shoe comprising a gib carrier, a leaf spring, means securingsaid spring Within said carrier with the longitudinal length of saidspring in approximate parallelism with said carrier, a gib mounted insaid carrier and bearing against said spring, and means upon said gibcooperating with said spring securing means for preventing thelongitudinal displacement of 4said gib in said carrier.

3. A guide shoe comprising a gib carrier, a

mspring, single means securing said spring to said icarrier, a gibmounted in said carrier and bearing against said spring, and means uponsaid gib cooperating with said single spring securing means forpreventing the longitudinal displacement in either direction of said gibin said carrier.

4. A guide shoe comprising a gib carrier, a leaf spring, a fasteningelement securing said leaf spring to the inner wall of said carrier, agib mounted in said carrier and bearing against said spring, and saidelement engaging said gib to prevent longitudinal displacement of saidgib in said carrier. i

5. A guide shoe comprising a gib carrier, a leaf spring, means forsecuring the approximate center portion of said spring to said carrier,a

gib having. a ybore therein and mounted within said carrier, and saidmeans engaging said bore for preventing longitudinal displacement ofsaid gib in said carrier.

ANKER J, HOLTER.

